Sweet

adj.kind, joyfulwarm

Meaning 1

Kind, affectionate, or gently considerate.

Reach for it when warmly praising a caring action, person, or manner

It was sweet of Niko to bring tea for the night crew.

everyday
kind
when care for another person's needs is the exact virtue
not when Kind is broader and less affectionate than sweet.
warm
gentle
when softness of manner or treatment matters most
not when Gentleness can be neutral and does not always communicate affection.
warm
thoughtful
when noticing and responding to a specific need deserves praise
not when A naturally pleasant manner can be sweet without involving forethought.
literary
endearing
when a quality awakens affection in others
not when Endearing describes the effect on observers, not necessarily an intentional kindness.

Pleasant to the taste, smell, or hearing.

Reach for it when describing an agreeable sensory quality, especially sugary flavor or gentle sound

The ripe peach tasted sweet and floral.

everyday
sugary
when a strong sugar-like flavor is the literal point
not when Sugary often sounds excessive and cannot describe music or fragrance.
professional
fragrant
when a pleasing scent rather than flavor deserves attention
not when Fragrant may be spicy, green, or woody without sweetness.
formal
melodious
when a pleasing musical quality is specifically audible
not when Taste, scent, and personal kindness cannot be melodious.
literary
mellow
when flavor or sound is smooth, rounded, and not harsh
not when Mellow does not necessarily mean sweet and can lack brightness.

The definition and the example on this page are written here. The dictionaries above ground which meaning is being described, not the wording.